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Defrosting control
• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• Defrosting control is available 40 minutes later since heating cycle started and the difference of the pipe tem-
perature of outdoor unit reaches above option 1.
• The defrosting control is available without reference to heating operation time only if the pipe temperature of
outdoor unit reaches below option 2.
The mean outdoor
temperature
Option 1
The minimum Time of
Heating(sec)
Option 2
Minimum Time
Of Heating
Setting Freq.
Operating
Freq. Of
Comp
(Comp off
Inapplicable.)
Operating
Setting Freq.
Freq. Of
Comp
(Comp off
Applicable.)
The Degree
of Superheat
Control
EEV
Open step
ON
4-Way
Setting
Speed
Indoor
FAN
Setting
Speed
Indoor
FAN
Pre-Heat
LED
Deice STEP
-10˚C less than
>4
And Heating operating time 40 minutes
-30
5sec 5sec
Step 5 (Option)_(13)
Min (Option)_(12)
15 sec
Step 5 (Option)_(13)
Min (Option)_(12)
off
OFF
0
1
2
-10~-5˚C between
-5~0˚C between
>5
Expected heating operating time
-30
Main Deice time
30 sec
Min (Option)_(12)
Min (Option)_(12)
300
(Option)_(14)
OFF
OFF
ON
3
4
0˚C more than
>5
>5
-25
-25
10 sec
1min
Setting
Freq.
Step 3 (Option)_(15)
off
Step 3 (Option)_(15)
off
Starting Step
ON
Setting
Speed
Hi Speed
Hot
Super low speed
Start
¡ low speed
OFF
5
6
Service Manual 35
Operation
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